Size of UIScrollView change by itself ???

[Nos]

Hi everybody,

In my Ipad app, i use one uinavigationcontroller.
When user touch a certain button, i use presentModalViewController to change the viewController of the navigationController. In this new uiviewController, i use UIScrollView which contain several pages. I launch my app in Landscape Mode, in the first page of the uiscrollView, the size of the uiscrollView is 1024x768 but when i begin to scroll, the size of the uiscrollView change to 768x1024 as if the other pages were left in portrait , i don't know why ???

Is there someone who could help me ?

Best Regards,

NosProduction